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What is plate tectonics? Earthquakes and volcanoes

By |2018-04-18T09:54:07+00:00September 21st, 2017|Geology|

The world as seen from space (flattened out) When you look at a map of the world, it seems as though it was always like that - North America on top of South America, Europe north of Africa, Australia off at the bottom right. But really all of the dry land on Earth moves around like floating shapes about 60 miles [...]

What are logarithms? Numbers and math

By |2017-07-29T16:38:58+00:00July 29th, 2017|Math|

Earthquake in Peru Logarithms are a way of writing numbers using exponents. "Log 100" means the exponent you'd need to use to get 100 starting from 10. That would be 2, because 102 = 100. So Log 100 = 2, and Log 1000 = 3. Logarithms are useful for thinking about big numbers in general terms, when [...]

Ibn Sina (Avicenna) – Medieval Islamic medicine – Islamic Empire

By |2018-04-24T08:21:22+00:00July 27th, 2017|Islam, Science|

Where Ibn Sina came from: Uzbekistan Ibn Sina and the Samanids in Uzbekistan Ibn Sina (known to Europeans as Avicenna) was a scientist. He was born about 980 AD in the north-eastern part of the Abbasid Empire. That was in the kingdom of the Samanids. (It's modern Uzbekistan.) The Samanids supported science and art, so many scientists and artists [...]

Who is Poseidon? Greek gods

By |2018-09-17T09:02:48+00:00July 16th, 2017|Greeks, Religion|

The god Poseidon rules the ocean Ocean god Poseidon The Greeks thought of the god Poseidon as a god of violent, unpredictable movement. He is most often the god of the ocean, which is of course the biggest, most unpredictable, and most dangerous thing around. Many Greeks spent a lot of time sailing on the ocean, and they paid [...]

Ancient Greek climate, plants, and animals

By |2018-09-17T07:53:12+00:00July 6th, 2017|Environment, Greeks|

Ancient Greek climate: The island of Rhodes Good fishing Fishing was very important to early Stone Age people, and fishing is probably what brought the first people to Greece. No part of Greece is more than about forty miles from the sea: a couple of days walking. So Greece was a great place [...]

Where are the Alps? Mountains in Europe

By |2018-04-21T11:56:39+00:00June 25th, 2017|Geology, Northern Europe|

The Alps The Alps are a long row of mountains dividing southern Europe from northern Europe.  France and Germany are on one side of the Alps, and Italy is on the other side. The Alps formed about 34 to 23 million years ago, in the Tertiary era. The African tectonic plate bumped into [...]

Earthquakes, tsunamis, and the Richter scale

By |2018-05-09T12:28:01+00:00June 23rd, 2017|Geology|

Earthquake in Peru - Earthquakes can split the ground open! What causes earthquakes? What causes earthquakes? Earthquakes happen when the moving tectonic plates that make up the surface of the Earth move apart or bump into each other, or slide under each other. This movement tears apart the surface of the Earth, or crunches [...]

Predicting earthquakes in ancient China

By |2018-04-18T18:18:12+00:00June 7th, 2017|China, Science|

Chinese seismograph (132 AD)(thanks to National Geographic) Earthquakes are a big problem in China, where there are many earthquakes, and often strong ones. Under the Han Dynasty, a man called Zhang Heng invented the first seismograph in the world - the first way to record an earthquake. Zhang Heng's seismograph was a bronze [...]